142 lines
5.3 KiB
Java
142 lines
5.3 KiB
Java
/*
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* Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package nsk.sysdict.share;
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import java.io.*;
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/**
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* This tools generates a chain of classes.
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* For more details, use:
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* <pre>
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* java ChainGen -help
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* </pre>
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*/
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public class ChainGen {
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private static final int FATS_HEIGHT = 5;
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private static final int FATS_WEIGHT = 10000;
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private static final int LEANS_HEIGHT = 50;
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private static final int LEANS_WEIGHT = 1;
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private static void explain(Object x) {
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System.err.println("# " + x);
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}
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public static void main(String args[]) {
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if (args.length < 1 || args[0].toLowerCase().startsWith("-h")) {
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explain("Generates a chain classes extending each other.");
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explain("");
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explain("Use:");
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explain(" java ChainGen $NAME $HEIGHT $WEIGHT");
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explain("Or:");
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explain(" java ChainGen \"fats\"");
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explain("Or:");
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explain(" java ChainGen \"leans\"");
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explain("");
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explain("This creates:");
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explain(" ${NAME}Info.java class displaying HEIGHT and WEIGHT.");
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explain(" ${NAME}XXXXXX.java defining classes chain.");
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explain("");
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explain("Here:");
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explain(" HEIGHT and WEIGHT must be positive integers.");
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explain(" Defaults for \"fats\": HEIGHT is " + FATS_HEIGHT
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+ ", WEIGHT is " + FATS_WEIGHT +".");
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explain(" Defaults for \"leans\": HEIGHT is " + LEANS_HEIGHT
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+ ", WEIGHT is " + LEANS_WEIGHT +".");
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System.exit(1);
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};
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String name;
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int height, weight;
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if (args[0].toLowerCase().equals("fats")) {
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name = "Fats";
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height = FATS_HEIGHT;
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weight = FATS_WEIGHT;
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} else if (args[0].toLowerCase().equals("leans")) {
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name = "Leans";
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height = LEANS_HEIGHT;
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weight = LEANS_WEIGHT;
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} else {
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name = args[0];
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height = Integer.parseInt(args[1]);
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weight = Integer.parseInt(args[2]);
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};
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try {
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doit(name, height, weight);
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} catch (IOException exception) {
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exception.printStackTrace(System.err);
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System.exit(1);
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}
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}
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private static void doit(String name, int height, int weight)
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throws FileNotFoundException
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{
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// Constants definition:
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PrintStream info = new PrintStream(
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new FileOutputStream(new File(name + "Info.java"))
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);
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info.println("// This file is generated by: ChainGen.java");
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info.println("package nsk.sysdict.share;");
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info.println("public class " + name + "Info {");
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info.println(" public static final int HEIGHT = " + height + ";");
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info.println(" private static final int WEIGHT = " + weight + ";");
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info.println(" public static final String rootName = \"" + name + "\";");
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info.println(" public static final String[] nodeNames = new String[] {");
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// Generate a series of fat classes:
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for (int index=0; index<height; index++) {
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String suffix = digits(index,6);
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String className = name + suffix;
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info.println(" \"" + suffix + "\""
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+ (index+1<height? "," : ""));
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PrintStream chain = new PrintStream(
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new FileOutputStream(new File(className + ".java"))
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);
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chain.println("// This file is generated by: ChainGen.java");
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chain.println("package nsk.sysdict.share;");
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chain.println("class " + className
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+ (index>0? " extends " + name + digits(index-1,6): "")
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+ " {");
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for (int w=0; w<weight; w++) {
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String fieldName = "fill_" + className + "_" + digits(w,6);
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chain.println(" static long " + fieldName + ";");
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}
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chain.println("}");
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chain.close();
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};
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//
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info.println(" };");
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info.println("}");
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info.close();
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}
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/**
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* Convert <tt>x</tt> to <tt>n</tt>-digits string.
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*/
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private static String digits(int x, int n) {
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String s = "" + x;
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while (s.length() < n)
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s = "0" + s;
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return s;
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}
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}
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